//引入该flexible.min.js
!function(e, t) {
  function n() {
      var n = l.getBoundingClientRect().width;
      t = t || 540,
      n > t && (n = t);
      var i = 100 * n / e;
      r.innerHTML = "html{font-size:" + i + "px;}"
  }
  var i, d = document, o = window, l = d.documentElement, r = document.createElement("style");
  if (l.firstElementChild)
      l.firstElementChild.appendChild(r);
  else {
      var a = d.createElement("div");
      a.appendChild(r),
      d.write(a.innerHTML),
      a = null
  }
  n(),
  o.addEventListener("resize", function() {
      clearTimeout(i),
      i = setTimeout(n, 300)
  }, !1),
  o.addEventListener("pageshow", function(e) {
      e.persisted && (clearTimeout(i),
      i = setTimeout(n, 300))
  }, !1),
  "complete" === d.readyState ? d.body.style.fontSize = "14px" : d.addEventListener("DOMContentLoaded", function(e) {
      d.body.style.fontSize = "14px"
  }, !1)
}(750, 750);